diff --git a/changelog.md b/changelog.md
index 147192cd..29e5b9f1 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,9 @@
 # Changelog
 
+### 1.0.3 (15-Feb-2018)
+
+* Fixed dectection of production mode. Fixes [#95](https://github.com/mweststrate/immer/issues/95)
+
 ### 1.0.2 (13-Feb-2018)
 
 * `flow-bin` and `cpx` were accidentally dependencies instead of dev-dependencies. Fixed
diff --git a/src/common.js b/src/common.js
index 426d7824..25eec19b 100644
--- a/src/common.js
+++ b/src/common.js
@@ -7,7 +7,7 @@ function verifyMinified() {}
 
 const inProduction =
     (typeof process !== "undefined" && process.env.NODE_ENV === "production") ||
-    verifyMinified.name === "verifyMinified"
+    verifyMinified.name !== "verifyMinified"
 let autoFreeze = !inProduction
 
 let useProxies = typeof Proxy !== "undefined"